Experimental study on ear pressure comfort of civil aircraft

Experimental research is conducted on the changes in internal and external ear pressure of different groups of people (young, middle-aged and elderly) under different cabin pressure altitudes, increase and decompression altitude change rates and durations, as well as the resulting changes in human ear physiological parameters such as hearing, Eustachian tube opening and closing, and ear comfort and discomfort thresholds.The results show that there is no significant correlation between the physiological parameters of the ear and the human ear comfort under changes in cabin pressure change rate.The threshold for opening the Eustachian tube in young subjects was 1.4 kPa, while that in older subjects was 1.48 kPa, indicating that the threshold for opening the Eustachian tube increases with age, and becomes more difficult to open when external pressure decreases.The heights above the ground when the pain reached level 4 or above for the young and older subjects were 1120m and 939m respectively, which was 19.2% higher for the young subjects than for the older subjects, indicating that young people are more sensitive to discomfort under changes in external cabin pressure and are more likely to feel uncomfortable.